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The aim of this work was to prepare composite ZnCdSeS quantum dot (QD) flexible films and to examine their optical properties under ultraviolet excitation. PMMA/QD ZnCdSeS composite films, with emission covering the visual spectrum (480–630nm) were prepared with concentrations 10mg/mL and 20mg/mL by homogenously diluting dry powder QD samples in toluene and subsequently mixing with a PMMA/MMA polymer...
The implementation of Management Information Systems (MIS) in educational management and administration is a relatively innovative field which is rapidly evolving because of its high efficiency and effectiveness. There is a relatively small number of research studies reported in the literature evaluating MIS implementations in universities. This case study focuses on the post-implementation evaluation...
The term Computer Numeric Control (CNC) is referred to an extended variety of electronically controlled machinery being used, among others, in drawing, cutting, milling, extruding and lathing. The fact that accuracy, reproducibility, and automation are achieved through the implementation of computer technology to the control of the machinery, consists an important feature. For the purpose of this...
Pneumatic positioning systems have always been attractive for robotics and automation applications due to their high power-to-weight ratio and low cost. On the other hand, achieving fast and accurate control of their position have been known as a complex control problem and in fact it has not been solved yet in a 100% percentage of position accuracy and repeatability. A smart way to implement the...
This paper presents a Fuzzy-PID controller for maximum power point tracking (MPPT) of photovoltaic (PV) systems. A DC/DC buck converter to regulate the output power of the photovoltaic system is considered. The Fuzzy-PID scheme operates on MPP and improves the performance of solar energy conversion efficiency. The offline optimization algorithm of Big Bang - Big Crunch (BB-BC) is applied on the parameters...
World Energy consumption and the resulting CO2 emissions are increasing substantially and this increase puts in danger the ecological stability of Earth. Growing scarcity and rising prices of fossil fuels may lead to economical and political instability in many countries in the near future. These problems can be solved by contributing significantly the use of renewable energy resources. The renewable...
This article presents the design methodology for an in-situ solar panel monitoring system based on wired and wireless sensor network technologies. The system presented provides in-situ performance data for each solar panel of a solar park installation and allows through a web-based application the optimization of electric power production. The proposed platform is based on wired networking technologies...
Development of an effective maximum power point tracking (MPPT) algorithm is important in order to achieve maximum power point in a photovoltaic system (PV). In this study, a dynamic neural control (DNC) scheme is developed. The adaptation procedure is based on the back propagation learning law and is required only a priori knowledge, that's, the system output error. The feasibility of the proposed...
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